When "Microsoft-HTTPAPI/2.0" is flagged alongside SSDP/UPnP, it is frequently found on specific ports:
To understand this keyword, it is essential to break down the three components that often appear together in security reports: microsoft httpapi httpd 2.0 (ssdp/upnp)
This signature indicates that a service is leveraging the kernel-mode driver rather than a full instance of Internet Information Services (IIS). Core Technologies Explained When "Microsoft-HTTPAPI/2
: A set of networking protocols that permit networked devices to seamlessly discover each other's presence and establish functional network services. UPnP eventing often uses TCP ports 2869, 5000, or 5357 . Common Port Associations Common Port Associations : This is the version
: This is the version string for the HTTP Server Version 2.0 API , which allows applications to communicate over HTTP without a dedicated web server. When a scanner sees this header, it means the request was handled directly by HTTP.sys .